ISPConfig 3.0.3.3 Autoresponder, adding subdomain problem

[BlackHat]

Hello,
I have installed ISPConfig 3.0.3.3 on Debian Squeeze. Emails are working creating also. I can't figure it out why maildrop isn't creating mailfilter directory and files. When I create .vacation.msg and .autoresponder manually it's working.
Here are few informations about my configuration:

drwxrwx--- 3 vmail vmail 4096 10-13 13:35 mailfilters

in /var/log/ispconfig/cron.log i keep getting following error:

Use of uninitialized value $_[1] in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm$

Also when i'm adding subdomain folder isn't autocreated.
Thanks in advance.
Best Regards,
Black
EDIT:
I forgot to mention. I'm using Courier.